On all my vehicles, the oil drain plug is just like changing a light bulb. Turning it counter clockwise should loosen it. Walmart doesn't torque parts correctly, as I'm sure a 16yr old did your oil change.

If you want to change your coolant I suggest getting a repair manual. There are generally a couple steps to completely drain the system and refill it so there are no air pockets which can cause hot spots in the engine and warp various parts. I haven't changed the coolant on my Taurus, but on my Dodge there is a relief valve on the block that you unscrew and remove after you've removed the lower rad hose. On one of my older cars, the rad had a drain plug in it. You'll have to look around closely if you decide to do this without a manual.

The AutoGuide.com network consists of the largest network of enthusiast-owned enthusiast-operated automotive communities.

AutoGuide.com provides the latest car reviews, auto show coverage, new car prices, and automotive news. The AutoGuide network operates more than 100 automotive forums where our users consult peers for shopping information and advice, and share opinions as a community.